hot-water heater

English Thesaurus

1. a heater and storage tank to supply heated water (noun.artifact)

hypernym	:	heater, warmer,
definition	:	device that heats water or supplies warmth to a room (noun.artifact)

hypernym	:	storage tank, tank,
definition	:	a large (usually metallic) vessel for holding gases or liquids (noun.artifact)

hyponym	:	water back,
definition	:	water heater consisting of a tank or pipes set at the back of a fireplace or in the firebox of a stove (noun.artifact)